Pyrophoric-ignition miner&#39;s safety-lamp.



P. FATTINGER.

PYRoPHomG IGNITION MINBRS SAFETY LAMP.

APPLICATION FILED DEO. 16, 1911.

1,109,055, t Patented Sept. 1, 1914.

. t Jllllllllllllllllilllllll THE NORRIS PETERS C0.. PHOTO-LITHO.. WASHINGTON, D4 C.

' UN1TED;:STATESPATENT OFFICE. f

FRANZ FATTI'NGER, or vfrireiBAoH, oARINTHiA, AUs'r31AHUNGARY,Assiettes.,'rov

fiRnIBAoniaRy onniaiscnn WERKE GnsELLsonArT BgjjH., or TREIB'AGH, lAus- TMA-HUNGARY, A oonroRA'iIoiv` or AUSTRIA.

`Specification of Letters Patent.

- Application led December 16, 1911.- ;4 SerialflNo: 666,144. E f v 'To all whom it mayconcem Be it known that I, DR; FRANZFATTINGER, a subject of the Emperor' of Austria-Hungary,4 residing at Treibach, Carinthia, Austria-Hungary, have invented certain new and useful Improvements in lPy-rophoric-A Ignition Miners Safety-Lamps, ofwhich the following is a specification.

This invention relatesrt'o miners safety lamps `and more particularly to miners-` safety lamps equipped with ignition ymeans i comprising a piece of pyrophoric alloy and means for `abrading the. same. A safety lamp of this type is illustrated and describedy in German patent No. 221295 granted Fer-l dinand Arthur Wicke and dated October 30,

An object of this invention is to provide asafety lamp of the character just referred to with means for preventing the escape of not allow dust or minute particles of solid substances to pass through. By this means complete safety against explosion is secured without appreciably affecting the entrance of the vair for combustion and the exit of the combustion gases. y

The present invention now consists substantiallyin providing a miners safety lamp with a 'dust filter between the lamp liame and the atmosphere. Said filter may be composed ofany suitable .substance being sufficiently refractory to heat in the form of a screenof; small bodies,wires, filaments or the like, for instance, sand, glass beads, glass wool, metalwool, yasbestos filaments, and the like, connected together or formed in one piece as by molding.

` In a lamp having aplurality of gauze protectors, the aforesaid dust filter is arranged between twovof the said protectors;

In 4a lamp-'having' `only one [gauze yprotector,th'ei'dust filter is'arranged inside it vover or against therair inlet holes.'

Patented sept. 1,1914. j

Where theffilte'r is" made vof'a vgoed heat y 4 conducting fmaterial, `for instance ofv a loose fabric of metalV wool, the kyusual' wire gauze protector' may be` dispensed ywith entirely, n

.becausain.such acase, the dust filter has also; the safety action' ofrawire gauze lpro-` ,tectoin f l In some constructions of` lamps the dust filter need notbe arranged over or against they air inlet holes.

' For filtering the combustion gases the lilteihas the form of a sleeve, cap casing` or basket. 1

When the filter has become thicklyladen with dust after long use, it should be cleaned, for instance, byl vblowing hot air through it. f.

Filamentous material, for instance, glass wool, isemployed in the condition of a very loose woven orffelted fabric in the formation of the dustfilter.

.y When fthe sand-like material is for tlie`^dust filter, the said material is poured in the -shape of a sleeve, cap or casing, between two gratings or lperforated employed V walls, for instance between two thicknesses` of wire gauze. l, 4 y

If convenient the usual gauze" protector or protectors may be used as a wall or walls for this purpose4 In the accompanying drawings 74A-.Figure l is anvelevation'partly in'l sectionV of one form of the invention, andFig. 2 is asimilar view of a modified formofthe invention.

In the forml shown in Fig. '1, ais the dust filter arranged'between the twowire gauze protectors-b and on in the medieeuen Sii-@Wn in Fig. fa, a

is a dust filter composed of metalwool or the like. In this last modification the dust filter d also lfulfils the function of the `wire 4gauze protector otherwise usually employed.

What I claim is 1. A pyrophoric-ignition miners safety lamp having a filter adapted and designed to intercept and retain unburnt particles of pyrophoric-alloy and prevent such particles from gainingk acces'sto the mine atmosphere,

while permitting fireelaccess of the same tol v the spaeewithinthe lter free flow 'of loo the gaseous products of combustionv therethrough.

2. A- py-rophoric-igniton `miners safety burnt particles-of pyrophoricalloy `and pre-` Vent suchparticles from gaining access to the mine atmosphere, while permitting free y i accessof'the same to, the space Within the Copies of this patent may be 'obtainedfor ve cents each, by addressing theommissioner ofy Patents,

filter and free How of the gaseous products of combustion therethrough.

l 4. A pyrophoric-ignition miners safety" lamp having a heat-conclucting screen and `a iilter adapted and' designed to intercept and retain unhurnt particles of pyrophoric alloy and prevent s uch particles from gaining vaccess to the mine atmosphere, While permitting Vfree access of the sanie to the spacewithin the filter and free flow of the gaseous products of combustion therethrough.

In testimony whereof l a-iX my signature in presence of two Witnesses.

DR. FRANZ FATTINGER.

Witnesses: V

ANDREAS FoRsTER,

OMY VICTOR LERZ.

Washington, D. C. 

